Wat bout the N/A b series that had bomb spent on it? That had cams. OP, the short of it is they will sound cool but you will be lucky to see any improvement at all and shifting the power band higher into the rev range isn't going to make it nice to drive day to day. In fact your not going to able to spin it hard enough(rpm) to see the benefit. But if money is no object and you just want it to sound tough, go hard. Given its an fg, cams zorst(2nd hand turbo one is a good cheap option) tune intake should see it push just over 200rwkw...which is far from sh*t for an na 6 but, same money spent on a turbo....